package com.qihe.reviewj2se;

import java.io.*;
import javax.management.*;
public class A {
    public void method() throws IOException {}
}
class B1 extends A {
    public void method() throws FileNotFoundException {}
}
class B2 extends A {
    //public void method() throws Exception {}
}
class B3 extends A {
   public void method() {}
}
class B4 extends A{
}
